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 <meta name="date" content="2003-07-09" />
 <title>ShowAlpha AviSynth Filter</title>
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<h3><a name="ShowAlpha"></a>ShowAlpha</h3>

<tt>ShowAlpha(</tt><i>clip clip, string pixel_type</i><tt>)</tt></br />
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Zeigt nur den Alpha-Kanal eines RGB32 Clips an.<br />
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 <tr><th colspan="2"><b>Parameter:</b></th></tr>
 <tr><td><i>pixel_type</i></td><td>Hiermit gibt an das Ziel-Farbformat an. G&uuml;ltige Werte sind <i>RGB</i>, <i>YUY2</i> oder <i>YV12</i>. Der Helligkeitsbereich beim YUV Farbraum ist [0-&gt;255].</td></tr>
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 <tr><th colspan="2"><b>Beispiele:</b></th></tr>
 <tr><td><tt>ShowAlpha()</tt></td><td>Zeigt den Alpha-Kanal eines RGB32 Clips</td></tr>
 <tr><td><tt>Overlay(YUY2Clip,RGBClip.ConvertToYUY2,mask=RGBClip.ShowAlpha(&quot;YUY2&quot;))</tt></td><td>Nutz den Alpha-Kanal des RGB Clips als Maske f&uuml;r <a href="overlay.htm">Overlay</a></td></tr>
 <tr><td><tt>mask=RGBClip.ShowAlpha(&quot;RGB&quot;).ConvertToYUY2.ColorYUV(levels=&quot;TV-&gt;PC&quot;)<br />
             Overlay(YUY2Clip,RGBClip.ConvertToYUY2,mask) </tt></td><td>Eine Alternative zu obigen Beispiel</td></tr>
 <tr><td><tt>mask=RGBClip.ShowAlpha(&quot;RGB&quot;)<br />
             Overlay(YUY2Clip,RGBClip.ConvertToYUY2,mask) </tt></td><td>Eine weitere alternative Syntax</td></tr>
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 <tr><th colspan="2"><b>Changelog:</b></th></tr>
 <tr><td><tt>v2.54</tt></td><td>Der Parameter <i>pixel_type</i> wurde hinzugef&uuml;gt</td></tr>
 <tr><td><tt>v2.53</tt></td><td>Erstes Release</td></tr>
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